Well drill-jar



PATENTED FEB. 2, 1904..

G. B. PATTON.

WELL DRILL JAR.

APPLICATION FILED JUNE 20, 1903.

2 SHEETS-SHEET 1.

N0 MODEL.

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attain PATENTEDFEB. 2', 1904.

G. B. PATTON.

WELL DRILL JAR.

APPLICATION FILED JUNB'ZO, 1902.

2 SHEETS-SHEET 2.

N0 MODEL.

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PATENT OFFICE.

GEORGE B. PATTON, OF IVILLIAMSTOWN, WEST VIRGINIA.

WELL DRILL-JAR.

SPECIFICATION forming part of Letters Patent No. 751,199, dated February 2, 1904.

Application filed June 20, 1903. Serial No. 162,424. (No model.)

To all whom, it ntcby concern.-

Be it known that I, GEORGE B. PATTON, a citizen of the United States, residing at VVilliamstown, in the county of WVood and State of West Virginia, have invented a new and useful ell Drill-Jar, of which the following is a specification.

My invention is an improvement in drilling jars for wells.

My improvements have for their object a drill-jar formed of separate detachable parts,

so that when one part is worn out or broken it can be replaced by a similar part, whereas in the ordinary form of drill-jars, in which the various parts are welded together, a breakage of one part necessitates the throwing away of the entire jar, and its breakage in the well will often cause much trouble and expense in fishing for it.

Another object of my improvement, therefore, is to provide a jar of such construction that when broken in use it can be readlly' fished out of the well.

A still further object is to so construct the jar that the force of the blow will not be cushioned by water which may have collected in the jar.

My invention consists of the novel features of construction and combination of parts hereinafter described, particularly pointed out in the claims, and shown in the accompanying drawings, in which Figure 1 is a vertical elevation, partly in section, the plunger being in a raised position. Fig. 2 is a similar view, the plunger being in its lowest position. Fig. 3 is a perspective view showing the jar with the parts assembled. Fig. 4 is a transverse section on the line 4 4 of Fig. 2. Fig. 5 is a detail view of the plunger. Fig. 6 is a perspective View of the plunger-cap. Fig. 7 is aperspective detail view of a bushing. Fig. 8 is a perspective view of a hard-steel shell. Fig. 9 is a perspective view of the screw-plug.

In constructing a jar containing my improvements I employ a hard-steel shell A, interiorly threaded at each end. I/Vithin the upper end of the shell is fitted a threaded bushing B, having a flange B at its upper end and a tempered-steel striking-surface B at its lower end. The plunger C works through this bushing. This plunger has the cylindrical reducedportion C, threaded at its lower end. Above the reduced portion is formed a shoulder C and above this is the squared portion C adapted to be gripped by a wrench. A hard-steel interiorly-threaded cap 0* fits over the lower end of the threaded portion C, the cap having a tempered striking-surface C adapted to engage the striking-surface B of the bushing.-

In the lower end of the steel shell is threaded the upper end of the usual socket-carrying screw plug or box D, also having .a squared wrench portion D. The upper end of this plug has a tempered striking-surface D receiving the blow delivered on the downstroke of the plunger, the under surface of the cap being also tempered.

An upper and lower set of apertures A are formed in the shell A, the openings of each set being diametrically opposite each other and arranged to come adjacent the strikingsurfaces. These openings prevent water from collecting in the shell and cushioning the blows of the plunger. They also enable the operator to examine the striking-surfaces and detect any flaw in them without taking the device apart.

It is obvious that should one of the surfaces crack or a part become broken as, for example, the capa new cap could be quickly substituted and the breakage of one part would not necessitate the discarding of the others.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A device of the kind described comprising a shell, a bushing secured in one endof the shell, a screw-plug having an inner tempered end fitting in the opposite end of the shell, a plunger working in the shell through said bushing, and a removable cap secured to the inner end of the plunger.

2. A drilling-jarcomprising a shell having upper and lower apertures arranged therein, a bushing fitting in one 'end of the shell and having a tempered striking-surface at its inner end, said surface being adjacent the upand having tempered striking-surfaces adaptper apertures of the shell, a plug fitting in ed to engagethestriking-surfaces'of thebushthe opposite end of the shell and having a ing and plug.

tempered striking-surface on its inner end, GEORGE B. PATTON. 5 said end being adjacent the lower apertures, a Witnesses:

plunger Working through the bushing and a FLOYD GUY ALLENDER,

cap fitting over the inner end of the plunger THOMAS EsLEY WILLISON, Jr. 

